tree 4f8680353c0888ff503c5e56c531ca5db5755c98
parent 437bfc58d9411353726c230c85c6056f950f44fe
author Armin Brauns <armin.brauns@embedded-solutions.at> 1675172644 +0100
committer Carles Cufí <carles.cufi@nordicsemi.no> 1675851842 +0100

drivers: ethernet: stm32: fix multicast filter configuration

With CONFIG_ETH_STM32_MULTICAST_FILTER=n, MACFFR was being set to 0 instead
of ETH_MULTICASTFRAMESFILTER_NONE, blocking all multicast traffic.

Instead, reset all the relevant bits first, then set either
ETH_MULTICASTFRAMESFILTER_HASHTABLE or ETH_MULTICASTFRAMESFILTER_NONE
depending on Kconfig.

This issue was introduced in #53850, `git diff a5f9fc2~2 a5f9fc2` (the
total diff of that PR) shows what happened - the
`tmp |= ETH_MULTICASTFRAMESFILTER_NONE;` line was removed completely
instead of being gated by `!defined(CONFIG_ETH_STM32_MULTICAST_FILTER)`.

Signed-off-by: Armin Brauns <armin.brauns@embedded-solutions.at>